計算機專業(yè)課程設計OPENGL旋轉立方體1000字OpenGL是一種跨平臺的圖形API，可以被用于開發(fā)3D渲染、可視化等應用程序。本文將介紹如何使用OpenGL旋轉一個立方體。首先，我們需要安裝OpenGL的庫文件和相關的工具。在Windows平臺下，可以使用Mingw-w64工具鏈和FreeGLUT庫進行開發(fā)。接下來，在創(chuàng)建OpenGL窗口后，我們需要創(chuàng)建一個立方體的幾何圖形：```c++glBegin(GL_QUADS);//開始繪制四邊形glColor3f(1.0,0.0,0.0);//設置顏色，這里是紅色glVertex3f(-1.0,1.0,1.0);//左上前角glVertex3f(-1.0,-1.0,1.0);//左下前角glVertex3f(1.0,-1.0,1.0);//右下前角glVertex3f(1.0,1.0,1.0);//右上前角glColor3f(0.0,1.0,0.0);//綠色glVertex3f(-1.0,1.0,-1.0);//左上后角glVertex3f(-1.0,-1.0,-1.0);//左下后角glVertex3f(1.0,-1.0,-1.0);//右下后角glVertex3f(1.0,1.0,-1.0);//右上后角glColor3f(0.0,0.0,1.0);//藍色glVertex3f(-1.0,1.0,1.0);//左上前角glVertex3f(-1.0,1.0,-1.0);//左上后角glVertex3f(1.0,1.0,-1.0);//右上后角glVertex3f(1.0,1.0,1.0);//右上前角glColor3f(1.0,1.0,0.0);//黃色glVertex3f(-1.0,-1.0,1.0);//左下前角glVertex3f(-1.0,-1.0,-1.0);//左下后角glVertex3f(1.0,-1.0,-1.0);//右下后角glVertex3f(1.0,-1.0,1.0);//右下前角glColor3f(0.0,1.0,1.0);//青色glVertex3f(-1.0,1.0,1.0);//左上前角glVertex3f(-1.0,1.0,-1.0);//左上后角glVertex3f(-1.0,-1.0,-1.0);//左下后角glVertex3f(-1.0,-1.0,1.0);//左下前角glColor3f(1.0,0.0,1.0);//粉色glVertex3f(1.0,1.0,1.0);//右上前角glVertex3f(1.0,1.0,-1.0);//右上后角glVertex3f(1.0,-1.0,-1.0);//右下后角glVertex3f(1.0,-1.0,1.0);//右下前角glEnd();//結束四邊形的繪制```這里我們用了`glBegin(GL_QUADS)`和`glEnd()`來將一個立方體拆解成了6個面，每個面都由一個四邊形組成。這個函數(shù)調用結束后，OpenGL會開始繪制所有的頂點。接下來，我們需要對立方體進行旋轉。我們可以通過下面的代碼來實現(xiàn)立方體的自轉：```c++glRotatef(angle,1.0f,1.0f,1.0f);//沿著(1,1,1)軸進行旋轉```這里我們利用了OpenGL中的旋轉函數(shù)`glRotatef()`。它的第一個參數(shù)是旋轉角度，后面三個參數(shù)是旋轉的軸向。在每一幀中，我們需要修改`angle`變量的值來控制旋轉速度。比如，可以在繪制循環(huán)的開始處加入如下代碼：```c++angle+=1.0f;```這樣每幀的`angle`都會增加1.0f，立方體也會不斷旋轉。完整的代碼如下：```c++#include<GL/glut.h>floatangle=0.0f;voiddisplay(){glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);glLoadIdentity();glTranslatef(0.0f,0.0f,-6.0f);//將物體移動到觀察點glRotatef(angle,1.0f,1.0f,1.0f);//沿著(1,1,1)軸進行旋轉glBegin(GL_QUADS);glColor3f(1.0,0.0,0.0);glVertex3f(-1.0,1.0,1.0);glVertex3f(-1.0,-1.0,1.0);glVertex3f(1.0,-1.0,1.0);glVertex3f(1.0,1.0,1.0);glColor3f(0.0,1.0,0.0);glVertex3f(-1.0,1.0,-1.0);glVertex3f(-1.0,-1.0,-1.0);glVertex3f(1.0,-1.0,-1.0);glVertex3f(1.0,1.0,-1.0);glColor3f(0.0,0.0,1.0);glVertex3f(-1.0,1.0,1.0);glVertex3f(-1.0,1.0,-1.0);glVertex3f(1.0,1.0,-1.0);glVertex3f(1.0,1.0,1.0);glColor3f(1.0,1.0,0.0);glVertex3f(-1.0,-1.0,1.0);glVertex3f(-1.0,-1.0,-1.0);glVertex3f(1.0,-1.0,-1.0);glVertex3f(1.0,-1.0,1.0);glColor3f(0.0,1.0,1.0);glVertex3f(-1.0,1.0,1.0);glVertex3f(-1.0,1.0,-1.0);glVertex3f(-1.0,-1.0,-1.0);glVertex3f(-1.0,-1.0,1.0);glColor3f(1.0,0.0,1.0);glVertex3f(1.0,1.0,1.0);glVertex3f(1.0,1.0,-1.0);glVertex3f(1.0,-1.0,-1.0);glVertex3f(1.0,-1.0,1.0);glEnd();glutSwapBuffers();}voidreshape(intw,inth){glViewport(0,0,w,h);glMatrixMode(GL_PROJECTION);glLoadIdentity();gluPerspective(45.0f,(GLfloat)w/(GLfloat)h,0.1f,100.0f);glMatrixMode(GL_MODELVIEW);}voididle(){angle+=1.0f;glutPostRedisplay();}intmain(